In recent years, the development of new energy vehicles has promoted the rapid growth of the energy storage battery market. This paper takes 25 listed battery storage companies in China from 2018 to 2020 as the research object, uses the data envelopment method DEA to evaluate their financial performance, and the cluster analysis method to divide the battery production listed companies into four categories to help investors to make in-depth understanding of the battery industry and make accurate investment decisions.